Pump Regulator Hose Rigidity Calculation
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Solution Overview
Problem
The existing methods for determining the rigidity of high-pressure hoses in systems like SCR systems are time-consuming and require manual calibration, which is inefficient and labor-intensive, especially when hoses need to be changed or replaced.
Innovation Solution
A pump system that calculates hose rigidity based on measured pressure amplitude and injector cycle parameters, allowing for automatic adjustment of the pressure regulator without manual calibration, using the equation B = A / (1 - γ) to determine the hose's rigidity and adjust the control signal for the pump.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual calibration of hose rigidity is performed for each hose type, then accurate regulation is achieved, but time consumption and labor intensity increase significantly
Solution Approach 1:
The system performs self-calibration by automatically determining hose rigidity through pressure measurements during normal operation. The control unit calculates rigidity based on pressure amplitude and injector cycle parameters without requiring manual intervention, allowing the system to adapt when hoses are changed or replaced.
Solution Approach 2:
The system uses feedback from pressure sensor measurements to continuously monitor and determine hose rigidity. By measuring pressure amplitude during injector cycles and feeding this information back to the control unit, the system automatically adjusts regulating parameters based on actual hose characteristics.
2Reliability
If manual calibration is performed for every hose change, then system accuracy is maintained, but productivity and operational efficiency decrease
Solution Approach 1:
The system automatically adapts to hose changes by performing self-calibration through pressure measurements. When a hose is replaced, the control unit detects the new rigidity characteristics through pressure amplitude measurements and automatically adjusts regulating parameters, eliminating the need for manual calibration during hose changes.
Solution Approach 2:
The system performs preliminary calibration actions automatically during normal operation by continuously monitoring pressure characteristics. This preliminary determination of hose rigidity allows the system to be ready for operation without requiring separate calibration steps before hose installation or replacement.
3Measurement precision
If hose rigidity is determined through physical measurement and manual input, then accuracy is achieved, but device complexity and operational difficulty increase
Solution Approach 1:
The system replaces manual mechanical measurement and input processes with automated electronic sensing and calculation. Pressure sensors continuously monitor hose characteristics, and the control unit automatically calculates rigidity from these measurements, eliminating the need for manual physical measurement and data entry.
Solution Approach 2:
The control unit automatically determines hose rigidity by processing pressure sensor data without requiring operator intervention. The system self-calibrates by calculating rigidity from pressure amplitude and injector cycle parameters, making operation simple while maintaining accurate measurement.
Data Source
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Figure 3
AI summary
Pump system comprising a pump, an injector and a regulator with a calculation unit, which regulator is adapted to controlling said pump by a control signal to pump a liquid through a hose to said injector which opens and closes in response to an injector control signal, the time for an opening and closing cycle being called injector cycle and designated T s , and the injector's open period being designated ?. The injector is provided with a pressure sensor adapted to measuring the pressure of the liquid in the injector and to delivering to the calculation unit in the regulator a pressure sensor signal which represents the pressure amplitude in the injector, the calculation unit is thus adapted to calculating the hose's rigidity B as a function of measured pressured amplitudes A in the injector, the injector cycle T s and the injector's open period ?, and the regulator is adapted to determining on the basis of B the control signal to the pump.